package com.tensquare.util;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Date;

public class JwtUtil {
    private String key;
    private long ttl;//一个小时

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public long getTtl() {
        return ttl;
    }

    public void setTtl(long ttl) {
        this.ttl = ttl;
    }

    /*** 生成JWT ** @param id * @param subject * @return */
    public String createJWT(String id, String subject, String roles) {
        long nowMillis = System.currentTimeMillis();
        Date now = new Date(nowMillis);
        JwtBuilder builder = Jwts.builder().setId(id)
                .setSubject(subject)
                .setIssuedAt(now)
                .signWith(SignatureAlgorithm.HS256, key)
                .claim("roles", roles);
        if (ttl > 0) {
            builder.setExpiration(new Date(nowMillis + ttl));
        }
        return builder.compact();
    }

    /*** 解析JWT * @param jwtStr * @return */
    public Claims parseJWT(String jwtStr) {
        return Jwts.parser().setSigningKey(key).parseClaimsJws(jwtStr).getBody();
    }
}
